Clenching device for box-nailing machines



(No Model.) 2 SheetsSheet 1.

J. McALLISTER 815 W. H. HAYES. GLENGHING DEVICE FOR BOX'NAILING MACHINES.

No. 593,232. Patented Nov. 9, 1897.

(No Model.) 2 Sheets-Sheet 2. J. McA-LLISTER & W. H. HAYES. GLBNGHING DEVICE FOR BOX NAILING MACHINES.

Patented Nov. 9, 1897.

UNITED STATES ATENT ,FFiCE.

JOHN MGALLISTER, or KINGS COUNTY, AND WILLIAM H. HAYES, or QUEENS COUNTY, NEW YORK, ASSIGNORS TO JOHN JOSEPH HAYES, or FLUSH- ING, NEW YORK.

CLENCHING DEVICE FOR BOX-NAILING MACHINES.

SPECIFICATION forming part of Letters Patent No. 593,232, dated November 9, 1897.

Application filed January 28, 1897. Serial No. 621,056. (No model.)

,To aZZ whom it may concern.- crank, operates the deflecting pressure-bar, Be it known that we, JOHN MGALLISTER, a is the continuation of or a face provided upon resident of Kings county, and WILLIAM H. the crank fitted to the main shaft of the nail- HAYES, a resident of Queens county, in the in g-machine. This crank also reciprocates State of New York, citizens of the United the cross-head and nail-punches of the boX- 5 5 States, have invented certain new and useful nailing machine.

Improvements in Clenching Devices for Box- The position of the cam or wiper with ref- Nailing Machines, of which the following is a erence to the crank-pin of the connecting-rod specification. determines how much of the nail will project IO Heretofore in all clenching devices used in beneath the material before being acted upon box-nailing machines the points of the nail, by the deflecting pressure-bar. after being driven through the material to be The cam or Wiper, before referred to, should operated upon, strike the anvil perpendicube set so that the points of the nails are inlarly and are crushed into the wood irregutercepted (as they project through the wood),

15 larly and ofttimes are riveted at their points by the deflecting pressure-bar, and then by or have their shanks crooked into the Wood the continued downward motion of the nailthrough which they have been driven. This punches and the angular upward motion of has been the result whether the anvil moves the deflecting pressure-bar the nails are vertically upward or the table drops and caused to curl upward at their points into the 20 allows the nails to strike their points upon a material in the direction of the lateral motion. firm anvil. This consequently causesa large When the nail-punches have completed amount of wear and tear on the nailing-matheir downward motion and the deflecting chine, and, instead of clenching the nails, pressure-bar has reached its highest point, 2. tends to crush or rivet them, and therefore squeeze upon the nails takes place, insuring 2 5 necessitates the expenditure of alarge amount a smooth surface to the wood. of power. In the accompanyingdrawings,Figure lis an The object of the present improvement is elevation and vertical section of a nailing-mato economize in power, to prevent undue Wear chine with clenching attachment and mechon the machine, and to clench each nail peranism in position. Fig. 2 is a section of bed 0 fectly and have their points turned upward and deflecting pressure-bar, on an enlarged into the wood, so as to present a smooth surscale, through the line d d, Fig. 6, showing face. To attain this object, we provide a bed the deflecting pressure-bar in its normal conupon the table of a nailing-machine in which dition. Fig. 3 is a section of deflecting presa'deflecting pressure-bar operates by means sure-bar through line b b, Fig. 5, on an en- 5 of a cam or wiper, fitted to the main shaft larged scale, showing bar at its highest poof the nailing-machine, which communicates sition. Fig. 4 is a section of material after motion to a lever at the base of the nailinghaving been operated upon. Fig. 5 is a rear machine. This lever, by means of aconnectelevation of the mechanism employed and ing-rod and bell-crank, transmits motion latalso of the deflecting pressure-bar and a sec- 4o erally to the deflecting pressure-bar. tion of bed through lines a a, Fig. 3, show-9o Upon the under surface of the deflecting ingbar at its highest positiomhaving clenched pressure-bar we provide a series of lugs havthe nails, the nail-punches, crank, and wiper ing inclined faces which ride upon rolls jourbeing at their lowest positions. Fig. 6 is the naled within the bed, and (by reason of the same view as Fig. 5, with the difference that 45 lateral motion imparted to the deflecting prescrank and Wiper are at their highest posi- 5 sure-bar are forced against these rolls) and tions and deflecting pressure-bar at its low cause the deflecting pressure-bar to have an est or normal position. upward angular motion. Referring by letters to the drawings, ,F rep- The cam or Wiper working upon the lever, resents the side frame of a nailing-machine;

50 which, by means of a connectingrod and bell- G, the driving mechanism; J, the cross-head .100

N, the table; E, the main shaft; E, the connecting-rod; K K, the nail-punches; I I, the nail-boxes; H, the nail-chutes. These parts are common to all nailing-machines and need no further description.

We will now describe the mechanisn employed in our improvements.

A is adefiecting pressure-bar, fitted to work freely in the bed A, which is placed on the table N of the nailing-machine inv the position shown in Fig. 1.

B is a carrier-pin projecting from the deflecting pressure-bar A through the front wall of the bed A and slot in lever B the hub of which is keyed to the shaft 0, which i is journaled in the bearing B The shaft 0 projects through the bearing B to allow the lever B to be keyed thereon. The levers B and B being set at ninety degrees become a bell-crank, with the bearing B between them for a fulcrum.

O is a connecting-rod the upper eye of which connects to the arm B of the bellcrank at c, and the lower eye connects at c to the lever O, which is pivoted in the lugs (3 on the frame F .of the nailing-machine.

C is a spring which is employed to recover the normal condition of the deflecting pressure-bar after an operation and can be placed as well on the slotted arm. of the bell-crank 13*.

B B B are steel rolls journaled within the bed A and upon which the inclined projecting lugs on the under surface of the deflecting pressure-bar ride to give the proper angular upward and lateral motion to the bar A.

D is a crank keyed to the main shaft E of the nailing-machine and (connected to the cross-head by the rod E) has a projection beyond the hub of the crank-pin, which forms a surface which acts as a cam or wiper, and at each revolution of the main shaft E depresses the lever C, and by its connection to the connecting-rod G and slotted arm of the bell-crank B workin g on the carrierpin 15', imparts motion to the deflecting pressure-bar A.

Land Lindicate the batten and boards used in boxes, and M indicates the clench.

The operation is as follows: The end of a box L is placed upon the clenching-table and a batten L being placed on top in its proper position, as shown in Fig; 1, the nailing-machine is started by means of the foot-lever and the nails come down the nail-chutes into the-naiI-boxes I I, and out of which they are forced by the nail-punches K K into and through the batten and box ends L and L. The points are intercepted by the deflecting pressure-bar A and are deflected in the direction of the lateral motion of the deflecting pressure-bar and by the continued downward action of the nail-punches K K and upward angular motion of the deflecting pressure-bar A. The points of the nails curl or turn upward, and when the nail-punches K K have reached their lowest position a squeeze takes place, by reason of the form and position of the wiper e, which forces the clench even with the surface of the wood, thus insuring a perfeet clench to the narrate a smooth surface to the wood.

We do not by this specification intend to confine ourselves to. the particular mechanism as set forth; but, l

Having described our invention, what we claim, and desire to secure by Letters Patent, is as follows:

1. The combination with aboX-nailing machine of a clenching device, consisting of a bed and a deflecting pressure-bar, fitted to slide therein, in a plane parallel to the face of the nailing-machine, of a carrier-pin thereon a bell-crank, with one of its arms slotted to engage with the carrier-pin, to cause with the rolls and inclined-plane support an upward and lateral motion to the deflecting pressure-bar; a lever pivoted to the side of the nailing-machine, a connecting-rod, connecting said lever to bell-crank, a cam or wiper on crank of the nailing-machine fitted to the main shaft of the nailing-machine so as to engage with the lever at each revolution of said main shaft substantially as specified. 2. The combination with a box-nailing machine of nail-punches, with a deflecting pressure-bar, and mechanism for causing an angular upward motion to the deflecting pressure-bar, timed with the downward motion of the nail-punches, so that the deflecting pressure-bar shall deflect the points of the nails as they are forced through the material, substantially as specified.

3. In a clenching device the combination of a bed and bar with roller and inclined-plane support, the inclined plane on the one and the rollers on the other, substantially as specified.

- JOHN MGALLISTER. WM. H. HAYES.

Witnesses:

A. R. BENN, FREDERICK K NOTHER. 

